Cook potatoes in boiling water just until tender; drain and set aside to cool. When cool, turn into large bowl and add celery, red and yellow peppers, cucumber, green onions, sweet pickles and boiled eggs.

Toss gently to mix.

In small mixing bowl, combine sour cream, mayonnaise, vinegar, mustard, salt and pepper; stir to mix thoroughly, then pour dressing over potato mixture and toss to combine all ingredients thoroughly.